Complete engine failure or seizure on the 2011 Kia Optima
When complete engine failure or seizure gets reported
Owners of the 2011 Kia Optima report complete engine failure or seizure at a median of 102,500 miles. A quarter of the reports come in before 92,500 miles and a quarter after 130,000 miles, from 32 reports that carried an odometer reading.
A part like this is normally expected to survive 105,000 miles. It is the 4th most-reported problem on this model year.
The mileage distribution
The reported range runs from 85,000 miles at the tenth percentile to 145,000 miles at the ninetieth, a spread of 60,190 miles across the middle 80% of reports.
When the reports scatter this far, the mileage is telling you about how these cars were driven more than about the part itself.
0% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 85,100 miles | 92,109 miles | 102,128 miles | 130,000 miles | 145,290 miles |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Putting it right typically runs $4,500–$12,000 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
This mode is classified as critical, which means a failure can leave the car unable to stop, steer, or stay out of the way of traffic. It is weighted accordingly in the risk score.
The same failure on other years
The same failure is reported on 6 model years of this car. It shows up earliest on the 2016, at a median of 50,000 miles, and latest on the 2014 at 115,000 miles.
By volume the 2015 carries the most reports, with 74; the 2011 has 39. A mode that appears across most years of a model is usually a design choice rather than a bad batch.
If one year stands out to the left, that is the year to avoid; if the whole line sits at a similar mileage, this is wear rather than a defect in one production run.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
Tl* the contact owns a 2011 kia optima. The contact stated that while driving at 15 MPH, the engine stalled without warning. The vehicle was diagnosed that the engine seized and needed to be replaced. It was unknown if the vehicle was taken to a dealer or independent mechanic. The vehicle was not repaired due to the parts not being available. The manufacturer was notified of the failure. The failure mileage was approximately 92,479.
On sept 24 2016 around 10 pm, driving home engine locks up, car turns off and I was unable to steer the car. Luckily I was heading around a wide turn and was able to slow the car down as it drifted off the road onto the edge of the road. Kia dealer diagnosed the engine failure with a hole in the block. Kia consumer support today sept 29, 2016 said they will not replace the engine. This problem seems to be pretty wide spread with many kia models as well as hyundai models. There also seems to be a class action starting against kia for not follow suite with hyundai when hyundai make owners aware. Same engine from same plant. Going to keep calling kia support until I get some help. I have not received any notice from kia about a recall or service notice as other have made note of receiving.
Same complaints as the others, 85,000 miles and the engine locked up while driving home. No check engine/low oil light. Had to have it towed to the shop, only to find out that my only option is to replace the motor. The shop's report was that the oil was low and dark, could not crank engine manually by hand, engine has internal damage and has to be replaced.. $4100 if I choose to proceed. We bought it used, and are sol.
Also reported on the 2011 Kia Optima
Other engine problem
Other steering problem
Headlight failure or clouding
Other brake problem
Steering column or shaft failure
Other electrical problem
How far this goes
Complaints are voluntary, so 39 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does complete engine failure or seizure happen on the 2011 Kia Optima?
Across 32 owner reports that included an odometer reading, half were filed by 102,500 miles. A quarter were filed before 92,500 miles and a quarter after 130,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is complete engine failure or seizure on the 2011 Kia Optima?
39 reports have been filed with NHTSA, about 0.6 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed